how to update a modules to adapt to drupal 6

Hello,

I have just installed drupal 6, but there are few modules to use. I would like to install a module in my Drupal 6, but it do'es work. It shows a message:"This version is incompatible with the 6.1 version of Drupal core".

Is't possible tomodify the modules to adapt the 6.1 version of Drupal? If so, how to do it? Thank you very much in advance for your help.